A (71) is a data type whose major attributes are determined by the rules governing the insertion and deletion of its elements. The only element that can be deleted or removed is the one that was inserted most (72) . Such a structure is said to have a last-in/first-out (LIFO) behavior, or protocol.

A．quickly

B．recentness

C．recently

D．fast

眼球前后径短，呈生理性远视，有人统计，新生儿95%为（），8岁以后眼球发育较快。

A.近视眼

B.弱视

C.散光

D.远视眼